JPS5875603A - Combustion method for solid matter - Google Patents

Abstract

PURPOSE:To efficiently and stably burn unburnt portion contained in a solid fuel, by adding powdery asphalt to powdery solid to mix with it after unburnt solid is collected, and by binding them into a lump to burn by acting a heating fluid. CONSTITUTION:Bulky solid in a solid fuel is separated from powdery solid by a classifier 8, fed into a fuel feeder 2 through a conveying means 9, and is fed into a combustion furnace 1 by the fuel feeder 2. On one hand, powdery solid is fed into a powdery fuel mixer 7 through a conveying means 10. While, unburnt solid matter in exhaust gas discharged from the combustion furnace 1 is collected by an unburnt solid catcher 4, and is fed also into the powdery fuel mixer 7 by a conveying means 5. Then, heating fluid is fed into a heating unit 11, passing through a heating fluid passage 13, heating the inside of a heating unit 11, where powdery asphalt is melted to be bound with powdery unburnt coal which is fed from the powdery fuel mixer 7. By this method, volatile component in the asphalt is added to the unburnt solid, as a result, the quality of solid as a fuel is improved, and unburnt loss of the fuel is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a combustion furnace, for example a stoker-fired combustion furnace, #L!
This invention relates to a method for burning solid materials such as coal, wood chips, pitch, and plastics in an I7I floor furnace.

A conventional combustion method will be explained with reference to the embodiment shown in FIG.

Combustion furnace 0' 1 contains lumpy solids and powdered solids as fuel 07
A duct 0 is provided at the outlet of the exhaust gas 08 of the combustion furnace 01.
An unburnt solids collection device 04 is provided in the middle of the pipe 3. A transportation means 05 that guides the unburned solids into the combustion furnace 01 is connected to the unburned solids outlet of the unburned solids collection device 04 . In addition, the combustion furnace 01 has 0 air for combustion/combustion in the combustion furnace 01.
It communicates with a blower 06 for supplying air.

A lumpy solid fuel 07 is supplied into the combustion furnace 01 from a fuel supply device 02, and the solid fuel 07 is combusted by combustion air 09 supplied through a blower 06. The ash and unburned song carvings contained in the exhaust gas 08 flowing through the duct) 03 are separated by the unburned solids collection device 04, the ash is discharged outside the furnace, and the unburnt solids are returned to the transportation means 05. The fuel is supplied to the combustion furnace 01 through the combustion chamber 01 and re-combusted.

In the conventional method, the recovered unburned solids are transferred to the combustion furnace 01Ka.
However, the fuel is not completely combusted and is carried away as unburned components outside the thread, making disposal time consuming. The lumpy/solid fuel 07 also contains a large amount of powdery solids, and the mixture of lumpy solids makes it more difficult to burn than when only the lumpy solid fuel 07 is used, increasing the power of the blower 06. (There was an example of that.

Therefore, it is also practiced to separate the powdery solids in a pretreatment stage and use only the lumpy solids as fuel. In addition, since the fuel needs to be circulated between the unburned solids collector 04 and the combustion furnace 010 many times until it is completely burned out,
Measures were taken to prevent clogging and abrasion of the circulation system by increasing the capacity of unburned solids (...collecting device 04).

SUMMARY OF THE INVENTION Accordingly, the present invention has been made with the object of providing a method for burning solid materials that efficiently and stably burns solid fuel and unburned matter discharged from a combustion furnace. The present invention provides a solid fuel that supplies solid matter into a combustion/destruction furnace and burns it, collects unburned solid matter in the exhaust gas discharged outside the furnace, and then supplies it into the furnace and burns it again. In the combustion method, the solid material is separated into a lumpy solid material and 1 gram of powdered solid material, and the lumpy solid material is fed into a furnace and burned, and the unburned solid material is recovered. The present invention provides a solid material combustion method characterized in that the powdered solid material and powdered asphalt are added and mixed together, and then a heating fluid is applied to form a lump, which is then fed into a furnace and burned. .

According to the method provided by the present invention, unburned solids and powdered solids in the exhaust gas are blown with powdered asphalt, and heated fluid is further injected into the chain to form agglomerates, which are then burned in a combustion furnace. As a result, unburned solids are not discharged unburned outside the furnace, resulting in good combustion efficiency, combustion is stabilized as powdery solids decrease, and a capacity amplifier for one device is not required. Even if solid matter is mixed in, it can be burned efficiently, and the fuel is completely combusted, so there is no need for multiple circulations in the system, and there is less trouble with clogging and wear in the system, and only ash is used as waste. Since it is discharged, disposal becomes easy, and even if the fuel contains a large amount of powdery solids, it can be used as fuel.
Benefits such as being able to use less fuel can be obtained.

Furthermore, since powdered asphalt is used, there is no need to heat the asphalt to liquefy it during transport.

Next, the present invention will be specifically explained based on the first embodiment shown in FIG.

The combustion furnace 1 is provided with a fuel supply device 2 that supplies lumpy solids into the combustion furnace 1, and an unburned solids collection device 4 is installed in the middle of a duct 3 connected to the exhaust gas outlet of the combustion furnace 1. It is provided. An unburned solid discharge port of the unburned solid proboscis bucket bundling device 4 is provided with a bucket feeding means 5 for introducing the unburned solid into the powder mixer 7.

The classifier 8 that separates the solids into lumpy solids and powdery solids has a fuel supply device 2 that supplies the lumpy solids from the lumpy solids discharge port.
The classifier 8 is provided with a transportation means 9 for transporting powdered solids to a powder mixer 7 (to be described later), and a transportation means 10 is provided for transporting the powdered solids to the powder mixer 7, which will be described later.The outlet of the powder mixer 7 is provided in a passage 12 for heating Vessel 1
1, heating fluids #c and wj13 are provided in the Calo heater 11.

Further, at the outlet of the heater 11, there is provided a transport means 14 for transporting the mixture to the combustion furnace. Furthermore, the combustion furnace 1 is in communication with a blower 6 for supplying combustion air into the furnace.

Solids' The lumpy solids in the fuel are separated from powder solids by a classifier 8, sent to the fuel supply device 2 via a transportation means 9, and supplied to the combustion furnace 1 from the fuel supply device. On the other hand, the powdered solids are passed through the transportation means 10 and run to the powder mixer 7.

Unburned solids in the exhaust gas from the combustion furnace 1 are collected by an unburned solids collector 4.

It is sent to the powder mixer 7 by means of transport 5.

FIG. 3 shows a cross-sectional view of the powder mixer 7 and the heater 110, in which solids collected from the exhaust gas by the unburned solids collector are transferred into the powder mixer 7 by means of transport 5. Powdered solids with a fine diameter are pulverized by the transportation means 1O, and 6-710% of the total amount of powdered asphalt, which is about 1 am, is sent by the transportation means 16, and the air pipe 17 is also connected to the powder mixer 7. Air at a temperature below room temperature is blown into the mixture and stirred. The residual nitrous air is also released by the air vent 18. After thoroughly mixing the unburned content and powdered fuel with the powdered Asu7 Alto, transfer it to the partition plate 19 at the bottom of the powder mixer 7, and then open the partition plate B20 of the heater 8 section and transfer it to the heater 1. The partition plate B20 at the top of the heater 11 is closed.

Next, a thermal fluid 9 such as exhaust gas, whose temperature is light minutes higher than the softening point of powdered asphalt and usually about 150°C, is sent from the inlet 13a of the heating fluid flow path 13 to heat the inside of the heater 11. Asphalt (powdered asphal) is combined with y-c and powdered unburned matter and coal. The heating fluid is discharged from the heating υIC body outlet 13b. After the powdered unburned content and coal combine with the asphalt, the heating fluid is stopped, and after the temperature inside the heating device 11 becomes below the softening point of the asphalt, the partition plate C21 at the bottom of the heating device 11 is opened to remove the lumps. The solid fuel that has become
Take it out from 2.

By burning solid matter in this way, the following effects can be obtained.

'a) The fsf emitting components in the asphalt are added to the unburned content of the powder, resulting in a high quality fuel and complete combustion.

B) By turning hard-to-flammable unburned powder into lumps, it becomes a fuel that can be combusted on a fixed bed, so it has good thermal efficiency. Since combustion is stable and complete, there are fewer problems such as clogging or wear within the system. Since only the ash is discharged as waste, disposal becomes easy.

Even if the fuel contains a large amount of powdered solids, it can be used as fuel, so a variety of fuels can be used.

FIG. 4 shows a second embodiment in which the present invention is applied to a thermal combustion furnace, and the only difference is that the heating fluid is taken from the exhaust gas flow path 15 for thermal heat.

That is, lumpy solids in solid fuel such as coal are separated by a classifier 8 and supplied to the combustion furnace 1 by a fuel supply device 2. The separated powder solids are sent to a powder mixer 7''.

Unburned solids in the exhaust gas are collected by a powder solids collector 4 and sent to a powder mixer 7. Next, the powdered asphalt is sent to the powder mixer 7, and after being stirred and mixed with air, it is sent to the heater 11, and the remaining heat of the exhaust gas is used to combine the powdery solids at the heating port, and the resulting lump fuel is sent to the combustion furnace 1. burn.

In the end, almost the same effect as in the first embodiment is added, and the volatile components in the asphalt are added to the unburned solids to improve the quality of the fuel, reduce unburned losses, and ``utilize the residual heat of the exhaust gas.'' Powdered asphalt can be combined with powdered solids.

[Brief explanation of drawings]

FIG. 1 is a flowchart of an apparatus for carrying out a conventional solid matter combustion method, FIG. 2 is a flowchart of a first embodiment of the present invention, and FIG. 3 is a flowchart of a powder mixer used in the present invention. FIG. 4 is a sectional view showing a pre-implementation body of the heater, and a flowchart of a second embodiment of the present invention. 01...Incinerator, 02...Fuel supply device, 03...Duct, 04...Unburned solid collection device, 05...Transportation means, 0
6.Blower, 07.Powdered solid fuel, 08.Exhaust gas, 09.Combustion air, ■.Combustion furnace, 2.Fuel supply device, 3.Duct, 4.Unburned solids collector,
5. Transfer means. 6. Blower, 7. Powder mixer, 8. Classifier, 9.
1O...transportation means, 11e-heater, 12...passage, 1
3. Heating fluid flow path, 14. Transportation means, 15. Heating exhaust gas flow path, 16. Transportation means. 17... Air pipe, 18... Air vent, 19, 20° 21
...Partition plates A, B, C, 22... Receiving board.

Claims (1)

[Claims] Solids are fed into the combustion furnace and burned, and unburned solids are recovered from the exhaust gas discharged outside the furnace and then fed into the furnace to be re-burned. /I In the combustion method, the solids are separated into lumpy solids and powdered solids, and the lumpy solids are fed into a furnace and burned, and the unburnt solids are collected and then burned. A method for burning solid materials, which comprises adding and mixing the powdered solids, carvings, and powdered asphalt, and then applying a heating fluid to the mixture to form a lump, and then feeding the mixture into a furnace and burning it.